Chair-seat spider.



No. 756,955. PATBNTED APR. 12, 1904.

J. M. GERMANSON.

CHAIR SEAT SPIDER. APPLICATION FILED 00T.17, 1902.

no MODEL.

"i waz /irmezzifm.

UNITED STATES Patented April 12 1904.

PATENT OFFIQE.

I JULIUS H. 'GERMANSON, OF HILIVAUKEE,WISCONSIN.

CHAIR-SEAT SPIDER.

SPECIFICATION forming part of Letters Patent No. 756,955, dated April 12, 1904..

v I Application filed October 17, 1902. Serial 110. 127,673. 110 model.)

To, a]! iv/mm, it may 0011 ccrn:

, "Be it'knownthat I, JULIUS M. (i'ERMANSOX,

of Milwaukee, in the county of Milwaukee and State of Vt'isconsin, have invented a new and useful Improvement in (hair-Seat Spiders, of which the following is a description, reference being had to the accompanying drawings, which are a-partof this specification.

' My invent-ion has relation to improvements in chair-seat spiders.

The object is to provide an improved form of seat-spider in which the principal parts are constructed from sheet metal, preferably steel,

whereby lightness, cheapnss, and the maximum strength are secured.-

Tit-h the above primary object in view the invention consists of the devices and parts or their equivalents, as here nafter more fully set forth.

In the accompanying drawings, Figure 1 is a side'elevation of the device. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1

looking upwardly. Fig. 3 is a central longitudinal central VIP-.V. Fig.4 is a cross-section on the line 4 4 of Fig. 3. and Fig. 5 is a "view of the blank for forming the spreader before said blank is shaped.

Referring to the drawings. the numerals 6 6 indicate the usual longitudinal arms, which are attached at their opposite ends to the under side of the chair-seat. These arms are made from metal, preferably steel, shaped or drawn into approximate inverted U shaped form. The inner depending flange or downwardly-bent portion of each arm is provided at a central point with a cut-out portion or spreader and a recess ing portion thereof; The said rear depend-r recess, .7.

The spreader portion of the device is likewise of sheet metal, preferably steel, stamped outin the form illustrated in Fig. 5 and then bent by means of a suitable die or oth'ei' desirableineans into the form illustrated in the other figures of the drawings. The dotted lines of Fig. 5 indicate the lines along which the blank is bent in order to give the requisite shape thereto. It is bent along theline a. to form a depending rear portion 8 and-a top portion '9. In the stamping process an elongated'slot 10 is formed in the-top of the 11 in the rear dependings are brought into registration when the ing lugs 16 16, around which are fitted bearings this class of devices.

ing portion is bent inwardlyalong the lines 7 l), torming the inner thicknesses 12 of the depending pivot-ears of the spider, and,

finally, the metal is bent downwardly along thelines c v to form the outer thicknesses 13 13 of the pivot-ears. Each inner thickness 12 is provided with an' opening l t and each outer thickness with an opening 15. 'lhcs-e openblank is shaped in the manner pointed out.

The spreader constructed as described is now adjusted to the under sides of the arms 6, with the depending portionb at the rear. The recesses 7* of theinner depending flanges ot' the arms permitthe ends of the spreader to pass therethrough and the outer sides of the upper ends of the pivot-ears to bear against the 111- ner sides of the outer depending flanges of the arms. The spreader so constructed is now secured to the arms in any desirable manner, preferah'y by rivets passed through the top of the arms and entering the ends of the top portion 9 of the spreader and additional rivets passing through the outer flanges of. the arms and entering the two thicknesses of metal of the pivot-ears. The-rear depending portion 8 of the spreader in the process of stamping or drawing the metal is also formed with project- 17 17, which bearings extend into the innerends of coiled springs 18 18. Arod 19 passes through the recess 11 of the rear portion of the spreader. The threaded forward extremity of this rod has turned thereon the. interior-lythreaded. tubular extension 20 of a hand-wheel 20. .The opposite end of'the rod passes through a cross-bar 21 and is provided with ahead hearing against the outer side'ojf the cross-bar. The said cross-bar on its inner side and at opposite ends is provided with inwardly-extending bearings 22 22, which project into the outer ends of the coilsof the springs 18. By turning the hand-wheel the tension of the springs 18 may be regulated, as is conimoii'in The head-piece of sheetmetal 23, preferably steel, bent'or shaped into approximately half-tubular form, wan the rounded side foremost, as clearly shown the spider is formed-from v [00 in thefdi'awings, and having at its top and bottom-rear edges the pro ecting lips 24- 24,

'openings or eyes 14,15, and 31.

which are provided, respectively, with registering openings 25. The chair-iron spindle 26 passes through these registering openings, and said spindle is formed with the annular shoulder 27, on which the ,lower lip 24 of the head-piece is seated. A transverse spacing-plate 28 is interposed between the rear edges of the head-piece, and this plate prevents .said edges from being bent toward each other. The central portion of the spacing-plate is bent into semitubular form in order to accommodate the chair-iron spindle, as indicated bythe numeral 29 and as clearly shown in Figs. 1 and.2.- -The ends of said plate are bent or flanged forwardly, as indicated by the numerals 30 30, said forwardly bent flanges having openings 31 31, which register with the openings 14 and 15 of the as shown clearly in Fig. 2. The upper'end of the spindle enters the elongated slot 10 in the top of the spreader, and the ends of said slot act as stops to limit the extent of the tilting of the.chair'seat. Just below the top piece 9 of the spreader the spindle is provided with a vertically-elongated slot 33, through which the rod 19 passes.

The spindle, furthermore, just above the upper lip 24: is intersected by a pin 34;, which bears against the said upper --lip and which, in conjunction with the annular shoulder 27 of the spindle, prevents vertical displacement of the spindle with respect,

to the head-piece. v n

I prefer to employ in connection with the rod 19 a collar 85, provided with the rear-.

inwardly-extending lugs 36, which bear against thespindle, Bythis construction when the spider is tilted a slight rocking play ofthe springs 18 is permitted, whereby the stress under which said springs are brought on account of said tilting operation is always main,

' tained in line with the center of the rod 19.

While the primary object of my invention 7 is to provide a chairseat spider having .;the

- longitudinal arms, the spreader, and the headpiece thereof constructedfrom sheetmetal bent or shaped as described, yetI do not wish to limit myself specifically thereto, inasmuch as said. parts maybe constructed of other 1 metal and provided with the different parts described Without departing from the spirit and scope of. myinvention.

' .sired form of longitudinal arms may be em ployed in connection with a spreader of the '1 form shown in the accompanying drawings,

and the specific form of head piecc, also shown in the drawings,.or, further, the specific term of head-piecemay be provided. in connection with other forms of spreaders and spider-arms. i piece Again, any de- 5 I a single blank of metal and shaped to form a top piece having downwardly-turned ends, a rear depending portion having" forwardly- My invention is also not necessarily limited to the pivot-ears formed of the two thick- ,nesses of metal, inasmuch 'as'the pivot-ears .could'be of a single thickness of metal merely by omitting the portions 12 or 13-of the blank without departing from the spirit and scope of my invention. I

From the foregoing description 'itwill be seen that the longitudinal arms, the spreader,

and the head-piece may be constructed fromsheet metal stamped and shapedinto the de-' sired form,'.thereby avoiding the necessity of constructing the spiderffrom cast metal, as is commonly done, and which metal, owing to it s brittleness, is subject to "breakage; I

furthermore provide a constructionwhich is.

simple and economicalto manufacture [and not only light in weight, but durable in 'u se.

The device is, furthermore, of such character j that the parts can'be readily put together and as readily separated'whenf necessary.

What I claim as my invention is" 1. In a chair-seat spider, the combination of loiigi tudin'al arms adapted to be attached at their'aends to a seat, a spreader secured at its ends to the arms, said spreader provided with an elongatedslot, dependingipivohears, aspindle extended upwardly into a slot, of

the spreader, the ends of said slot acting as stops tocontact with the extended end of-the spindle, and thereby limit the tilting'of the chair, and said spindle provided below the upper extremity thereof with an elongated slot, a head-piece supported on the spindle, a

bolt for pivotally connecting the head-piece to the pivot-ears, and a spring-pressed adjusting-rod passing through the elongated slot of the spindle. 1

2. In a's eat-spider, the combination of longitudinal arms adap ed to be attached at their ends to a-seat, a spr ader secured at itsends to the arms, said spreader. provided with a top piece and with a rear depending portion, the top piece having an elongated slot therethrough, and the ends of said top'portion being downwardly bent to form the outer thicknesses of pivot-ears, and the rear depending portion having its ends forwa rdl y bent to form the inner thicknesses of the depending pivot-ears,,-

a spindle having itsupper'end extending into the elongated slot of the spreader, a head-piece ears.

3. In a seat-spider, the combination of longitudinal arms adapted to be secured-at their ends to a seat, a spreadersecured at its ends to the arms, said SPI'OflClQl' being struck from flanged ends, the said forwardly-flanged ends constituting inner thicknesses ofv pivot ears,

and the downwardly-turned ends of the top forming outer thicknesses of said pivot}- cars, a spindle, a head-piece supported on the spindle, anda bolt for pivotally connecting the head piece to the pivot-ears.

4. 'In a seat-spidenthe combination of iongitudinal arms adapted to be attached at their ends. to a seat, a spreader secured at its ends to the arms,'said spreader provided with atop piece and with a rear depending portion, the

top piece having its ends providedwith depending portions forining'the outer thicknesses of pivot-ears. and the rear dependingportion provided with arecess, and having its ends .forwardly flanged and forming the inner thicknessesof pivot-ears, a spindle provided below. its upper extremity with an elongated slot, a head-piece supported on the'spindle, a

- belt for pivotally connecting the head-piece to the pivot-ears, and a spring-pressed ad justin grod passing through the recess of the depending rear portion of the spreader and through the elongated slot of the spindle.

5. Ina seat-spider, the combination of longitudinal arms adapted to be attached'at their ends to a seat, a spreader secured at its ends to the arms, dependingpivot-ears, a headpiece of approximately semitubular form with its rounded side foremost, andhaving its rear edges providedwith projecting apertured lips, a spindle passing through the registering apertures of the lips and supporting the head-piece, and a bolt for pivotally connecting the head-piece to the pivot-ears.

6. In a seat-spider, the combination of longitudinal arms adapted to be attached at their ends to a seat, a spreader secured at its ends to the arms, depending pivot-ears, a head piece struck from a single sheet of metal and formed into approximately seniitubular form with its rounded side foremost, and with pro jecting apertured lips at its rear edges, a spindle passing through the registering apertures of the lips and supporting the head piece, and a belt for pivotally connecting the head piece to. the pivotears'.

7 In a seat-spider,.t he eombinationof lon gitudinal arms adapted to be attached at their ends to a seat. a spreader secured at its ends to the arms, depending pivot-ears, a head-piece of approximatelysemitubular 'form with its rounded side foremost and having its rear edges provided with prQ ecting apertured lips,

. a spindle supporting the head-piece and pass ing-through the registering apertures of the lips, a spacing-plate arranged between the rear edges of the headpiece and rounded at a ,medial portion for the accommodation of the apertured lips, a spindle supporting the head piece and passing through the registering apertures of the lips, a spacing plate arranged between the rear edges of the head-piece, the ends of said plate being turned forwardly and provided with apertures, anda bolt having its endsjsupported in the'registering apertures of the pivot ears and theforwardlyturned ends of the'spacing-plate,said bolt pivotally connecting the head-piece to the pivot-ears 9. Ina seat-spider, thecombination of flongitudinal arms adapted to be attached at their ends to a seat, a spreader secured at its ends to the arms, said spreader struck from'a sin gle blank of metal and shaped to for'm'a top piece having depending ends forming pivotears, a head-piece struck from a single-blank of metal and shaped into approximate semitubnlar form with the rounded side-foremost, andformed at its rear edges with projecting apertured lips, a spindle supporting the headpiece and passing through the registeringapertured lips of said head-piece, and a bolt for pivotally' connecting the head-piece to the pivot-ears. I

10. A spreader for a seatspider, comprising a top piece having downwardly-bent ends forming the outer thicknesses of pivot-ears, and a rear depending portion having for- Wardly bent ends forming the inner thicknesses of the pivot-ears...

'11. Aspreaderforaseat-spiderstruck from a single. blank of metal and shaped to form a toppiece having depending ends constituting the outer thicknesses of pivot=ears, and a rear depending portion having forwardlybent ends forming the inner thicknesses of the pivot ears. i I

12. A headpiece for a seat-spider, consisting of a semitubular piece having its top and bottom edges provided with proj fcting hori 'zontal apertured lips.

13. A head -piece for a seat-spider struck from a single blank of metal and shaped into semitubular form, the top and bottom. edges, thereof formed with projecting horiz ontalzap ertured lips.

14. A head-piece I ing of a semitubular piece having its top'and bottom edges provided with projecting horizontal apertured lips, and a spacingplate between said ton and bottom edges.

15. A headpiece for a seat-spider, consisting of a semitubuiar piece having its top and bottom edges provided with projecting aperfor a seat-spider, consisttured lips, and a spacing-plate between said top and bottom edges, said spacing-plate providedwith forwardly-turned apertured ends. In testimony whereof I affix my signature i n presence ottwo witnesses,

A. L. MonsnLL, C. T. BENEDICT. 

